Help me.......What is the 6SN7 ???????

cd149dc · 16th June 2007, 08:24 AM

Hello,

Anyone could tell me what version of 6SN7 tube.

Thank you so much,

gianis · 16th June 2007, 08:17 PM

6sn7 with ceramic elements???? Strange to me.....

anatech · 16th June 2007, 08:20 PM

Hi cd149dc,
I've never seen one like that either. It may be industrial, military or remarked Russian for all I know. If it is really a 6SN7, I'll bet it is not microphonic. Have you tried it in anything?

-Chris

Colt45 · 16th June 2007, 09:02 PM

Never seen it before. what does the stamp on the side say.. i cant see from the pictures.

anything on the bottom of the base?

Johan Potgieter · 16th June 2007, 10:32 PM

Ditto here.

Geometry looks like classic 6SN7 (have a normal one here), with anode surface somewhat larger. I guess that it is somehow a higher anode dissipation type, or designed to work in very hot areas plus perhaps conditions of vibration/shock.

Cd149dc, can you tell us where you found it or any more information? Most interested.

ilimzn · 17th June 2007, 10:25 AM

East German military 6SN7 (often has both US and russian markings) made by WF. I have a couple of those with the original labeling intact, it comes above the 6SN7 mark on yours. I'm not sure the elements are ceramic, but rather something like compressed mica. Still, they work very well...

Brian Beck · 17th June 2007, 01:11 PM

Very interesting tube. I've collected a lot of different 6SN7s, but I've never seen one like that. The ceramic support wafers have that "Red Bank" appeal.

As Johan suggests, the larger radiator fins coming off both sides of the plates ought to give a larger plate dissipation rating, all else being equal.

Ilimzn or cd149dc, do either of you have the East German part number, and the data sheet associated with it? I'm curious about how similar this tube is to a regular 6SN7.

jacco vermeulen · 17th June 2007, 01:27 PM

A picture of the Werk Fernmeldewesen type is
here

Maybe the previous owner no longer appreciated the Russian type marking.

Brian Beck · 17th June 2007, 02:49 PM

Jacco's linked photo shows dual markings: 6H8C and 6SN7. The data sheet for the 6H8C suggests a near equivalent to the 6SN7. Max plate voltage and dissipation ratings are lower, surprisingly. Whether the 6H8C shares the fabled linearity of the 6SN7, I can't say.

6H8C data sheet

anatech · 17th June 2007, 03:42 PM

Hi Brian, Jacco,
That make sense.

Thank you for pointing out the datasheets.

-Chris

16th June 2007, 08:24 AM	#1
cd149dc diyAudio Member Join Date: Mar 2006 Location: Ha Noi	Help me.......What is the 6SN7 ??????? Hello, Anyone could tell me what version of 6SN7 tube. Thank you so much, __________________ DIY forever

16th June 2007, 08:17 PM	#2
gianis diyAudio Member Join Date: Jan 2004 Location: athens	6SN7 6sn7 with ceramic elements???? Strange to me.....

16th June 2007, 08:20 PM	#3
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi cd149dc, I've never seen one like that either. It may be industrial, military or remarked Russian for all I know. If it is really a 6SN7, I'll bet it is not microphonic. Have you tried it in anything? -Chris __________________ "Just because you can, doesn't mean you should" © my Wife

17th June 2007, 01:11 PM	#7
Brian Beck diyAudio Member Join Date: Dec 2004 Location: South Florida, USA	Very interesting tube. I've collected a lot of different 6SN7s, but I've never seen one like that. The ceramic support wafers have that "Red Bank" appeal. As Johan suggests, the larger radiator fins coming off both sides of the plates ought to give a larger plate dissipation rating, all else being equal. Ilimzn or cd149dc, do either of you have the East German part number, and the data sheet associated with it? I'm curious about how similar this tube is to a regular 6SN7. __________________ Brian

17th June 2007, 01:27 PM	#8
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, Rotterdam or Curaçao	A picture of the Werk Fernmeldewesen type is here Maybe the previous owner no longer appreciated the Russian type marking. __________________ Not so much,.......if it says "ZM" in the corner.


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

16th June 2007, 09:02 PM	#4
Colt45 diyAudio Member Join Date: Feb 2002 Location: Canada	Never seen it before. what does the stamp on the side say.. i cant see from the pictures. anything on the bottom of the base?

16th June 2007, 10:32 PM	#5
Johan Potgieter diyAudio Member Join Date: May 2005 Location: Pretoria, South Africa	Ditto here. Geometry looks like classic 6SN7 (have a normal one here), with anode surface somewhat larger. I guess that it is somehow a higher anode dissipation type, or designed to work in very hot areas plus perhaps conditions of vibration/shock. Cd149dc, can you tell us where you found it or any more information? Most interested.

17th June 2007, 10:25 AM	#6
ilimzn diyAudio Member Join Date: Feb 2005 Location: Zagreb	East German military 6SN7 (often has both US and russian markings) made by WF. I have a couple of those with the original labeling intact, it comes above the 6SN7 mark on yours. I'm not sure the elements are ceramic, but rather something like compressed mica. Still, they work very well...

17th June 2007, 02:49 PM	#9
Brian Beck diyAudio Member Join Date: Dec 2004 Location: South Florida, USA	Jacco's linked photo shows dual markings: 6H8C and 6SN7. The data sheet for the 6H8C suggests a near equivalent to the 6SN7. Max plate voltage and dissipation ratings are lower, surprisingly. Whether the 6H8C shares the fabled linearity of the 6SN7, I can't say. 6H8C data sheet __________________ Brian

17th June 2007, 03:42 PM	#10
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Brian, Jacco, That make sense. Thank you for pointing out the datasheets. -Chris __________________ "Just because you can, doesn't mean you should" © my Wife

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
6SN7 pre-amp	Andersen	Tubes / Valves	57	17th July 2011 06:00 PM
SE 6SN7 amp....	JandG	Tubes / Valves	24	6th March 2011 11:37 AM
6sn7's	irishguy170	Swap Meet	0	15th January 2008 07:09 AM
Is it the 6SN7 or me?	arnoldc	Tubes / Valves	4	12th October 2006 11:31 PM
6SN7 CCS	Cassiel	Tubes / Valves	25	14th February 2006 10:09 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read